Sash latch



Aug- 13, 1929- v R. H. BERGSTROM 1,724,637

SASH LATCH Filed Aug. 51, 1927 Mmc MMM

Patented Aug. 13,1929.

UNITED STATES ROY H. BERGSTROM, 0F LOS ANGELES, CALIFORNIA.

SASH LATCH.

Application filed August 31, 1927. Serial No.` 216,577.

This invention relates to improvements in sash latches.

An object of the invention is to provide an improved sash latch which isadapted to be mounted upon one of two sash movable relatively to eachother, which will serve to rlimit the relative movement between the sashso that they can not be opened from the outside.

Another object of the invention is to provide a sash latch for the abovementioned purpose which will take care of itself so that it is normallyin that position which will limit the relative movementbetween the sashso thatv it; is not necessary to manipulate any part in order to holdthe sash against relative movement. The improved sash latch however, canbe moved into such position from the inside as to perm'itthe relativemovement of the sash.

A further object ofthe. invention isy to provide an improved sash latchwhich is self-actuated on moving the sash from open position to closedposition. f

Another object of the invention is to pro`- vide a sash latch of novel,simple and durable construction.

With the foregoing and other objects in view, which` will be mademanifest in the following detailed description vand specilicallypointed'- out in the appended claims,A

reference is had to 'the accompanying draw.- ings for an: illustrativeembodiment of the invention, wherein: i

Figure 1 is a partial view in perspective of two sash, illustrating theimproved sash latch as having been mounted thereon. Fig. 2 is a verticalsection.v taken substantially upon; the line 2-2 upon Figure l,illustrating the sash in ful-ly closed position before the sash latchhas become operative.

Fig.v 3 is a view similar toFigure2, illustrating the manner` in whichthe latch limits the relative movement between'the sash.'

Referring to the accompanying drawing `wherein similar referencecharacters designate similar parts throughout, the frame of the windowis indicated at F, in which there are two sash, S and S. Tlhese windowsash are vertically slid-able in the window frame and the;y sash S isshown as havin-g a stile 10 and a bottom rail 11,'while the lower sash Shas a top rail- 12 and a stile 13. The sash latch consists of an opensided housing 1&1 which is adapted to be recessed in the stile 10 of theupper sash. This housing is somewhat deeper at the bottom than at thetop and has an apertured flange 15 about its open side to receive screws16 by which it may be attached to the stile 10. A pin 17 extendstransversely across the housing and serves to pivotally mount a latchmember 18 which has a s-lot 19 through whichl the pin extends. The latchmember, whenv in the position .shown in Figure 2, presents an outwardlyand downwardly inclinedA outer surface 20, a rounded bottom surface 21and a shoulder 22 on its inner surface which, when the vlatchV memberismoved into the position shown in Figure 3, forms a horizons talabutment. vThe formation of the latch member is such that it normallypro-jects a short distance throughv the open side of the housing due togravity. To insure the latch member assuming suchnormal position, a

. small leaf spring 23 is fastened tothe back of the housing `and isengageablewith the latch member to keep it in this position.

' The back and top walls of the housing are so positioned that when `thelatch member is swung into the upper position, the edge 24e will bearagainst the back and top walls of the housing so as to limit themovement ofthe latch member int-wo directions when the latchY member isin its upper or locking. position. Such bearing engagement between the'edge 24' and the back and top walls is permitted by the pin and slotconnection at 17 and'19;

Y rEhe operation of the improved sash lock is as follows:

` The'latch member being in the position shown in Figures 1 and 2, ifeither ofi the sash. should be started from the closed position to theopen position, the latch. inem .ber will have its bottom surfaces 21engage the top surface-ofthe rail 12 onthe lower sash S. A furthermovement causes theA latch member 18 to swing upwardly from the positionshown in Figure 2y to the dotted line position shown on this figure orthe full line position shown in .Figurel In suchpositionthe shoulder 22forms' theA hor'izontal abutment which is adapted to be engaged by thetopY surface of the rai-1l 12,

limiting the relative movement betweenthe sash. In such position anyforce imparted to either of the sash to force the sashf open will` betransmitted by the latch member to the back and top walls of` thehousing, 14

so that all-strain on the pin 17 is eliminated.

If it is desired to open the sash, this can be accomplished by forcingthe latch member inwardly againsty the action of the spring 23 so thatthe latch member will be entirely contained within the housing. Vhile insuch position the lower sash S can be started upwardly or the upper sashS can be started downwardly, and after the edge l24. has passed beneaththe top surface of the rail 12, the latch member will be kept within thehousing by its engagement with the outer side of the stile 13. When thesash are subsequently moved into closed position, the latch member y18is caused to swing outwardly into the position shown in Figure 2. Ifdesired, a protecting plate 25 may befastened over the top surface ofthe rai1'12 and down over the outer surface of the stile 18 to preventthe latch member `from marring or scratching the lower sash. From theabove described construction it willbe appreciated that it is notnecessary to manipulate the latch in order to have it hold the sashagainst material relative movement.` Whenever the sash are moved intotheir closed positions, the latch acts automatically to move intolocking posit-ion.

' The improved sash latch is not limited in of the invention use to theexact position shown. If the window has merely the lower sash slidable,the sash latch can be mounted either upon the upper stile 10 or on thewindow frame F so as to engage the top rail 12 of the lower sash S in amanner similar to that as above described. It will thusbe seen that anovel, simple, durable and advantageous sash latch is provided which canbe easily and quickly installed, and which may have an attractiveappearance. Y l

This sash latch is, especially intended for permitting the lower orupper sash to be raised or lowered respectively for ventilation and yetpreventing t-he unauthorized furtherV opening of the sash from-theoutside,thusv being in a sense a burglar proof device. y Y It will beunderstood that various changes inthe details of construction may bemade Vwithout departing from the spirit or scope as defined by theappended claims. I

I claim: Y Y

`1. A sash latch comprising an open Vsided housing, a latch member'pivoted within the housing and capable of being swung through Vthe openside thereof,jsaid latch member normally assuming a position partiallyprojecting from the housing but beingcapable Vof beingY moved into aposition wholly within the housing Y or into another position wherein 1tpartially projects from the housmg, s aid latch member in the lastmentioned posltion bearing against walls of the housing s0 as to takethe strain oit' the pivot when a force is applied to the latch member. i

2. A sash latch comprising a/housing having an open side, a latch membermounted within the housing and having a in and slot connectiontherewith, said latc member normally assuming a position projecting fromthe housing but being capable of being moved into a position whollywithin the housing or into a locking position projecting from thehousing, said latch member being adapted to bear against the top andback walls of the housing when in such position as and for the purposedescribed.

3. A sash'latch comprising a housing having an open side, a latch membermounted within the housing and having a pin and slot connectiontherewith, Ysaid latch member normally assuming a position projectingfrom the housing but being capable of being moved into a position whollywithin the housing or into a locking position projecting from thehousing, an means yengageable by the latch member to limit its movementin two directions when in the last mentioned position as and for thepurpose described.

4. A sash latch comprising an open sided housing, -a latch membermounted for movement within the housing, said latch member being capableof being swung upwardly through the open side of the housing into alocking position but normally assuming a lower position partiallyprojecting from the housing, said latch member presenting a downwardlyand outwardl inclined surface in such position, a roun ed bottom surfaceand a shoulder on its inside surface adapted to form a horizontalabutment projecting from the housing V'when theVr`v latch member is inlocking positionfsaid latch member being adapted to-'bear against thetop and back walls of the housing when in locking position. e

5. A latch for a pair of window sash one of which at least is movablerelatively tothe other, comprising means providing a pivot on one of thesash, a latch member mounted upon said pivotandV normally disposed onthat side of the pivot most adjacent the other i pivot on one of thesash, a latchumember relative movemounted upon said pivot and normallydis- Y j posed on that side of the pivot most adjacent the other sashand in a position Wherein it will be engaged by said other sash uponrelative movement between the sash, said latch member being capable ofbeing moved by said other sash to a position on the opposite side of thepivot and presenting a shoulder in such position adapted to be engagedby said other sash s0 as to prevent further relative movement betweenthe sash,-

and means upon which the latch member may engage in the last mentionedkposition so as to take some of the strain from oil' the pivot.

7. A latch for a pair of window sash one of which at least is movablerelatively to the other, comprising means providing a pivot on one ofthe sash, a latch member mounted upon said pivot and normally disposedon that side of the pivot most adjacent the other sash and in a positionwherein it will be engaged by said other sash upon relative movementbetween the sash, said latch member being capable of being moved bysaid.- other sash to a position on the opposite side of the pivot andpresenting a shoulder in such position adapted to be engaged by saidother sash so as to prevent further relative movement between the sash,said latch member being capable of being moved into a position to permitrelative movement between the sash.

8. A sash latch comprising an open sided housing, means providing apivot at approximately the center of the housing, a latch member mountedupon said pivot normally assuming a position partially within the matelythe center of the housing, a latchV member mounted upon said pivotnormally assuming a position partially within the housing on one side ofthe pivot and partially projecting through the open side thereof, saidlatch member being capable of being swung through the open side of thehousing on the opposite side of the pivot from the first mentionedposition, said latch memberl presenting an outwardly extending shoulderextending outwardly from the open side of the housing when in the lastmentioned posi# tion and a leaf spring mounted in the housing engageableupon` the latch member and assuring its being partially projected fromthe housing, when in the first mentioned position by permitting thelatch member to be forced into a position wholly within the housing.

In testimony whereof I'have signed my name to this specification.

R. H. BERGSTROM.

